Intangibles - Intangible Assets Other Than Goodwill and Trade Names (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	$ 3,395.8	$ 3,480.9
Intellectual property, patents, non-compete and other intangibles
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	1,083.5	1,108.9
Intangible assets, accumulated amortization	147.8	123.8
Backlog
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	1,312.4	1,342.1
Intangible assets, accumulated amortization	119.0	92.0
Customer relationships
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	999.9	1,029.9
Intangible assets, accumulated amortization	$ 222.2	$ 212.9